Biologists agree that human beings evolved from a fish, but Conclusion they disagree about which species of fish. █████ ██████████ █████ ████ █████ ███ ██████████ ███████ ██ ███ ███████ ██ ████ ████ █████ █████ ██████ ████████ ██ ███ █████ ██ █ █████ █████ ███████ ███ █████████████ ███ ██ ████████ ███ ████ ██ █████ ███ ████████████ ██████ ████ ████ ████████ ████ ██ █████████ ███ ███████ ██ ███ █████ █████ ████████ ████ █████████████ ███ ███████ ███ ███████ ██ ██ █ ████████ █████████ ██ █████████████ ███████ ███████ ████ ████ ███████ ██ █████ ███ ██████ ███ █████ ████████ █████ ███████ ███ ██████████ ██ ███████████ ██ █████████ █████ ███ ████ ██ █████████ ██████ ████ █████ ██████ ████ ██ █████████ ████ ████████████
The author concludes that biologists disagree about which species of fish from which humans evolved. The author proceeds to outline two biologists’ perspectives. The biologists agree that frogs are related to this species of fish. Dr. Stevens-Hoyt says that lungfish are the ancestor of humans because the mitochondrial DNA of lungfish is similar to that of frogs. Dr. Grover rejects Dr. Stevens-Hoyt because mitochondrial DNA evolves too rapidly to demonstrate relationships between species. Rather, Dr. Stevens believes that coelacanths are the ancestor of humans because the hemoglobin of coelacanths matches that of tadpoles.
The proposition in the question stem refers to a point of agreement between the scientists.
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